Bantuin dong..
Himpunan penyelesaian persamaan cos 2x - sin x =0 , untuk 0 <= x <= 360
+ caranya ya :))
Himpunan penyelesaian persamaan cos 2x - sin x =0 , untuk 0 <= x <= 360
+ caranya ya :))
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1-2sin^2x-sin x=0
-2sin^2x-sinx+1=0
(-2sinx+1)(sinx+1)
-2sinx=-1
sinx= 0,5 v sinx=-1
x=30°+k.360 x=270°+k 360
x= 30 x=270
Hp{30,270}